Smooth Muscle

Question 1

Smooth muscle

Answer 1

-Lines walls of viscera
-Found in longitude or circular arrangement
-Alternate contraction of circular and longitude (squeezing) muscle in the intestine leads to peristalsis (squeezing of the muscle)

Question 2

Structure of smooth muscle

Answer 2

-Spindle shaped uni-nucleated cells
-Striations not observed
-Actin and myosin filaments are present (protein fibers)

Question 3

Smooth muscle summary

Answer 3

-Found in walls of hollow internal organs (intestines, bladder, uterus)
-Involuntary movement of internal organs
-Elongated, spindle shaped fiber with single nucleus